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®
IBM System Storage SAN768B-2 and SAN384B-2
Fabric Backbones
IBM Redbooks Product Guide
This IBM® Redbooks® Product Guide describes the IBM System Storage® SAN768B-2 and SAN384B-2
fabric backbones. IBM System Storage SAN768B-2 and SAN384B-2 fabric backbones are among the
industry's most powerful Fibre Channel (FC) switching infrastructure offerings. They provide reliable,
scalable, high-performance foundations for mission-critical storage. These fabric backbones also deliver
enterprise connectivity options to add support for IBM FICON® connectivity, offering a high-performing
and reliable FICON infrastructure with fast and scalable IBM z Systems™ servers.
The IBM System Storage SAN b-type family switch, which is designed to support Fibre Channel
connectivity for servers and storage, introduces the next generation of fabric backbones with Gen 5 Fibre
1
Channel and Fabric Vision technology to bring a long-term solution for mission-critical applications that
require secure, high-performance, and low-latency storage networks. This enables organizations to
continue using their existing IT investments as their businesses grow, and solve their most difficult
business challenges, unleashing the full potential of high-density server virtualization, cloud architectures,
and next-generation storage.
Figure 1 shows the SAN768B-2 and SAN384B-2.
Figure 1. SAN768B-2 and SAN384B-2
IBM System Storage SAN768B-2 and SAN384B-2 Fabric Backbones
1
Did you know?

SAN768B-2 and SAN384B-2 enable simpler, flatter, and low-latency chassis connectivity to reduce
network complexity, management, and costs by using UltraScale chassis connectivity.

You can simplify and centralize end-to-end storage area network (SAN) administration with
comprehensive diagnostic tests, monitoring, and automation through Fabric Vision technology.

SAN768B-2 and SAN384B-2 allow faster problem identification, SAN configuration and management
with customizable IBM Network Advisor health, and performance dashboards.
Architecture and key components
SAN768B-2 and SAN384B-2 address key customer requirements while consolidating the SAN
infrastructure. These fabric backbones with Gen 5 Fibre Channel technology are available in two modular
form factors.

Built for large enterprise networks and measuring 14U, SAN768B-2 has eight vertical blade slots to
provide up to 512 16 Gbps universal (E, F, D, M, and EX) Fibre Channel ports using 64-port 16 Gbps
Fibre Channel blades.

Designed for midsize networks and measuring 8U, SAN384B-2 has four horizontal blade slots to
provide up to 256 16 Gbps universal (E, F, D, M, and EX) Fibre Channel ports using 64-port 16 Gbps
Fibre Channel blades.
The Gen 5 Fibre Channel technology directors support 2, 4, 8, 10, and 16 Gbps Fibre Channel, FICON,
Fibre Channel over Ethernet (FCoE), and 1/10 Gbps Fibre Channel over IP (FCIP). These Gen 5 Fibre
Channel director models offer maximum investment protection by performing the following functions:






Interfacing with existing 2, 4, 8, or 16 Gbps Fibre Channel ports
Offering configurable 10 Gbps ports for metro optical connectivity
FCoE connection exclusively on the SAN768B-2
Offering 1/10 FCIP for global SAN extension infrastructure
Offering fabric-based encryption for data-at-rest to protect valuable digital assets
Integrating with the IBM Network Advisor unified network management solution to bridge operational
gaps across server, network, and storage administrators
Built upon years of innovation and using the core technology of systems that perform at up to 99.999%
uptime, the new generation of SAN b-type networking backbones helps minimize downtime and disruption
for some of the world’s most demanding data centers.
Both models can do the following functions:

Support 2, 4, 8, and 16 Gbps Fibre Channel or FICON connections, 10 Gbps Fibre Channel
inter-switch link (ISL) connections in metro optical connectivity or with 10 Gbps dense wavelength
division multiplexing (DWDM) devices, in-flight encryption, and compression, 64 (4 × 16) Gbps
inter-chassis link (ICL) connections and 1/10 Gbps FCIP.

Leverage fabric-based encryption for data-at-rest.

Integrate with advanced fabric services and management tools.

Deliver compatibility with the 8 and 4 Gbps IBM System Storage b-type SAN director, switch, and
router models.
IBM System Storage SAN768B-2 and SAN384B-2 Fabric Backbones
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Performance
Emerging and evolving critical workloads and higher density virtualization are continuing to push the limits
of SAN infrastructures. SAN768B-2 and SAN384B-2 directors feature industry-leading Gen 5 Fibre
Channel technology that delivers 16 Gbps line-speed performance and up to 10.2 Tbps of chassis
bandwidth with the 64-port 16 Gbps high-density blade connectivity option to address next-generation I/O
requirements. In addition, local switching capabilities ensure that data traffic within the same port group
does not consume slot bandwidth, which maximizes the number of line-rate ports.
Performance capabilities are as follows:

SAN768B-2
o
Up to 512 ports (equivalent to 640 with UltraScale ICLs) at 16 Gbps in a single chassis
10.2 Tbps chassis bandwidth
8.2 Tbps Fibre Channel
2.0 Tbps UltraScale ICL bandwidth



o

512 Gbps bandwidth per slot
SAN384B-2
o
Up to 256 ports (equivalent to 320 with UltraScale ICLs) at 16 Gbps in a single chassis
5.1 Tbps chassis bandwidth
4.1 Tbps Fibre Channel/FICON ports
1 Tbps UltraScale ICL bandwidth



o
512 Gbps bandwidth per slot
Each SAN768B-2 and SAN384B-2 contains redundant control processor modules (active/passive) and
core blades (active/active), plus slots for Fibre Channel port blades and advanced functionality. All Fibre
Channel ports on the blades support full-duplex, non-blocking performance. These backbones are
available with a number of selectable options. The base systems do not include any blades, but at least
one blade is required for host and storage connectivity, and two blades are recommended for
redundancy. Based on the different power consumption of each port or specialty blade, various
configurations result in higher than 2000 W power usage; the customer is required to purchase a pair of
optional power supplies.
Available blades for SAN768B-2 and SAN384B-2 are as follows:

16 Gbps 32-port, 48-port Fibre Channel blades : These port blades provide 2, 4, 8, 10, or 16 Gbps on
each port, which can be configured as E, F, M, EX, or D_ports. These advanced 16 Gbps blades
deliver enhanced fabric resiliency and application uptime through advanced features that are enabled
by the Condor3 application-specific integrated circuit, including support for native 10 Gbps Fibre
Channel, in-flight encryption and compression, ClearLink diagnostic technology (D_Ports), and
increased buffers or Forward Error Correction (FEC). Fully populated options are available.

16 Gbps and 8 Gbps 64-port Fibre Channel blade : This blade, now also available in 16 Gbps, allows
midsize-to-large enterprise customers to deploy high-density, chassis-based solutions to minimize a
physical footprint without compromising performance. The 64-port blades do not support FICON, but
can be used in the same chassis-switching FICON traffic.
Figure 2 shows the 16 Gbps 64-port blade (FC 3664).
IBM System Storage SAN768B-2 and SAN384B-2 Fabric Backbones
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Figure 2. 16 Gbps 64-port blade (FC 3664)

8 Gbps Enhanced Extension blade : This blade is a scalable and flexible platform combining Fibre
Channel and advanced FCIP technology, which is designed for building or expanding a
high-performance SAN extension infrastructure for disaster recovery, data protection, and data
mobility storage solutions to move more data faster and further. It provides Internet Protocol Security
(IPSec) over both 10 GbE ports versus the previous blade’s support on one port. It is ideal for open
systems and mainframe disk and tape extension, multi-site synchronous and asynchronous disk
replication, centralized SAN backup, recovery and archiving, and global data and storage resource
migration, distribution, and sharing. This blade offers twelve 8 Gbps Fibre Channel ports, ten 1 GbE
ports with a license option for up to two 10 GbE ports per blade; up to four blades per
SAN768B-2/SAN384B-2 director.

FCoE 10GbE 24-port blade: This new blade provides FCoE and Data Center Bridging (DCB) for
end-of-row server connectivity, delivering line-rate 10 Gbps performance across 24 ports. It is
supported in only the SAN768B-2 (2499-816). A maximum of one blade is allowed per director.
Figure 3 shows the FCoE 10GbE 24-port blade (FC 3880).
Figure 3. FCoE 10GbE 24-port blade (FC 3880)
Scale-out network design
Networks are evolving to adapt to rapid growth and change in the server and storage infrastructure.
UltraScale chassis connectivity leverages optical ICLs to connect up to 10 SAN768B-2 and SAN384B-2
backbones up to 2 kilometers apart, enabling flatter, faster, and simpler fabrics that increase consolidation
while reducing network complexity and costs.
UltraScale ICLs enable scalable core-edge and active/active mesh chassis topologies. These
high-density chassis topologies reduce inter-switch cabling and free the ports for servers and storage,
thus maximizing overall port density in a lower amount of rack space.
IBM System Storage SAN768B-2 and SAN384B-2 Fabric Backbones
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Fabric Operating System and management software
The Fabric Operating System (FOS), included with each SAN768B-2 and SAN384B-2 Gen 5 Fibre
Channel base system, contains all the functions that are necessary to operate a base system. These
systems require FOS V7.1 or later to take advantage of the advanced functions that are delivered through
1
Fabric Vision technology. SAN768B-2 and SAN384B-2 base systems are always enabled with the
following tools:

Web Tools: Enable graphical user interface (GUI)-based administration, configuration, and
maintenance of fabric switches and SANs.

Zoning: Segments a fabric into virtual private SANs to restrict device communication and apply
certain policies only to members within the same zone.

Full Fabric: Enables E_Ports and allows SAN768B-2 and SAN384B-2 to connect to other switches.

Virtual Fabrics: Allow a physical switch to be partitioned into independently managed logical switches,
each with its own data, control, and management paths.

Enhanced Group Management (EGM): Enables extra device-level management functionality for SAN
b-type products when EGM is added to the element management. Also allows large consolidated
operations to groups of devices (such as firmware downloads and configuration uploads and
downloads).
Enterprise software bundle
The enterprise software bundle is a bundle of FOS features on top of the base FOS functionality that is
included in the hardware base for both the SAN768B-2 and the SAN384B-2. It includes the following
features:

Adaptive Networking : This service is a set of features that provides users with tools and capabilities
for incorporating network policies to ensure optimal behavior of a large SAN. The FOS V7.0 release
(or later) supports two types of quality of service (QoS) features with the 16 Gbps fabric backbones:
Ingress Rate Limiting and SID/DID-based prioritization.

Advanced Performance Monitoring : Helps identify end-to-end bandwidth usage by host/target pairs
and provides for capacity planning.

Extended Fabrics: Extend SAN fabrics beyond the Fibre Channel standard of 10 kilometers (km) by
optimizing internal switch buffers to maintain performance on ISLs that are connected at extended
distances.

Fabric Watch: Constantly monitors mission-critical switch operations for potential faults and
automatically alerts administrators about problems before they become costly failures. Fabric Watch
includes Port Fencing capabilities.

ISL Trunking: Enables Fibre Channel frames to be distributed efficiently across multiple ISLs between
two IBM b-type SAN fabric switches and directors while preserving in-order delivery. Both b-type SAN
devices must have trunking activated. SAN768B-2 and SAN384B-2 add enhanced ISL Trunking
support using 16 Gbps ports and enable Fibre Channel packets to be distributed across up to eight 16
Gbps-capable ISLs for a combined bandwidth of up to 128 Gbps.

Server Application Optimization : This license optimizes overall application performance for physical
servers and virtual machines by extending virtual channels to the server infrastructure.
Application-specific traffic flows can be configured, prioritized, and optimized throughout the entire
data center infrastructure.

Fabric Vision: This license offers a collection of breakthrough features and tools that are bundled into
an optional licensed feature. It includes Flow Vision and Monitoring and Alerting Policy Suite (MAPS)
advanced technologies and capabilities. It requires FOS V7.2 or later.
IBM System Storage SAN768B-2 and SAN384B-2 Fabric Backbones
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Advanced capabilities can be enabled with extra optional licenses that are available:

FICON with control unit port (CUP) activation: Provides in-band management of the supported SAN
b-type switch and director products by system automation for IBM z/OS®, performance data for IBM
Resource Measurement Facility™ (IBM RMF™), and to provide unsolicited status to IBM MVS™. This
support provides a single point of control for managing connectivity in active FICON I/O
configurations. To enable in-band management on multiple switches and directors, each chassis must
be configured with the appropriate FICON CUP feature. Up to four CUPs per chassis can be enabled.

Integrated routing : Allows any 8 or 16 Gbps Fibre Channel port in SAN768B-2 and SAN384B-2 to be
configured as an EX_Port that supports Fibre Channel Routing (FCR), providing improved scalability
and fault isolation, along with multi-vendor interoperability.

Inter-Chassis License with eight 16Gbps 2 km QSFPs: This license activates ICL ports on the core
blades of the 16 Gbps platforms. One ICL license enables only half of the ICL ports on the core
blades of a SAN768B-2 platform or all of the ICL ports on the core blades of a SAN384B-2 platform.
Each feature ships quantity eight 16 Gbps 2 km QSFP transceivers that are capable of providing
connectivity up to 2 km.

Inter-Chassis License with sixteen 16Gbps 100 m QSFPs: This license activates ICL ports on the
core blades of the 16 Gbps platforms. One ICL Ports on Demand (POD) license enables only half of
the ICL ports on core blades of a SAN768B-2 platform or all ICL ports on the core blades of a
SAN384B-2 platform. Each feature ships sixteen 16 Gbps 100 m QSFP transceivers that are capable
of providing connectivity up to 100 m.

16Gbps 2 km QSFP: This feature provides one 16 Gbps QSFP, designed to provide Fibre Channel
connections at distances up to 2 km.

Inter-chassis QSFP bundle : Provides sixteen 16 Gbps, QSFPs supporting connectivity up to 100
meters from the switching backplane of one half of an 8-slot chassis to the other half, or to a 4-slot
chassis.

Inter-Chassis License conversion : Is used to convert an ICL activation that is transferred from an 8
Gbps model as part of the model conversion process.

Enterprise ICL license : Supports up to 3840 × 16 Gbps universal Fibre Channel ports (using 16 Gbps
48-port blades), up to 5120 × 8 Gbps universal Fibre Channel ports (using 8 Gbps 64-port blades),
ICL ports (32 or 16 per chassis, optical QSFP) connected up to nine chassis in a full-mesh topology or
up to 10 chassis in a core-edge topology. Connecting five or more chassis through ICLs requires an
Enterprise ICL license.
These optional advanced SAN Extension functionality licenses are available also:

8 Gbps Advanced Extension activation license : Enables two advanced extension features, FCIP
trunking and adaptive rate limiting (ARL) on the SAN768B-2 or SAN384B-2 systems. The FCIP
trunking feature allows multiple IP source and destination address pairs (defined as FCIP circuits)
through multiple 1 GbE interfaces to provide a high-bandwidth FCIP tunnel and failover resiliency.
The ARL feature provides a minimum bandwidth guarantee for each tunnel with full usage of the
available network bandwidth without impacting throughput performance under high traffic load.

8 Gbps Extension blade 10 GbE activation license : Enables up to two 10 GbE ports on the 8 Gbps
extension blades or 8 × 10 Gbps Fibre Channel ports on any eight ports of a 16 Gbps port blade. With
this license, two extra operating modes, in addition to 1 GbE port mode, can be selected. Either two
10 GbE ports or ten 1 GbE and one 10 GbE ports can be configured on an 8 Gbps extension blade
when this license is activated. One feature code should be installed and activated for each port blade
to be enabled for 10 Gbps Fibre Channel.

8 Gbps FICON Accelerator activation license : Uses advanced networking technologies, data
management techniques, and protocol intelligence to accelerate FICON disk and tape read-and-write
operations over geographically extended distances, while also maintaining the integrity of command
and acknowledgment sequences. This is ideal for data migration, disaster recovery, and business
IBM System Storage SAN768B-2 and SAN384B-2 Fabric Backbones
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continuity solutions beyond 300 km, and it supports emulation for IBM z/OS Global Mirror (formerly
Extended Remote Copy or XRC) and tape pipelining for FICON tape and virtual tape.
IBM Network Advisor simplifies Gen 5 Fibre Channel management and helps users proactively diagnose
and resolve issues to maximize uptime, increase operational efficiency, and reduce costs. The
wizard-driven interface dramatically reduces deployment and configuration times by allowing fabrics,
switches, and ports to be managed as groups. Customizable dashboards graphically display performance
and health indicators come ready to use, including all data captured using Fabric Vision technology. To
accelerate troubleshooting, administrators can use dashboard playback to quickly review past events and
identify problems in the fabric. In addition, dashboards and reports can be configured to show only the
most relevant data, enabling administrators to more efficiently prioritize their actions and maintain network
performance. IBM Network Advisor V12.0 or later is required for supporting transitions to cloud
environments. IBM Network Advisor V12.1 or later is required for supporting Fabric Vision license
capabilities.
Optimized data center connectivity over distance
Connecting distributed data centers enables data mobility for advanced data protection solutions. The
SAN768B-2 and SAN384B-2 fabric backbones include integrated metro and global SAN extension
capabilities, which can provide application agility and support flexible business continuity and disaster
recovery solutions.
The b-type director family with Gen 5 Fibre Channel technology enables high-speed replication and
backup solutions over metro or WAN links with native Fibre Channel (10/16 Gbps) and optional FCIP
(1/10 GbE) extension support. Extending Fabric Vision technology between data centers enables
organizations to move more data faster and minimize the impact of disruptions and outages for non-stop
business operations. The integrated metro connectivity includes in-flight compression and encryption to
optimize bandwidth, and helps reduce the risk of unauthorized access.
Benefits are as follows:

Unleash the full potential of cloud storage with outstanding scalability, performance, and reliability

Reduce network complexity, management, and costs with ultra-scale chassis connectivity

Simplify and centralize end-to-end storage area network (SAN) administration

Protect investments in existing SAN fabrics and automation tools while reducing costs and minimizing
disruption

Speed problem identification, SAN configuration, and management with IBM Network Advisor
dashboards

Maximize performance for I/O-intensive and bandwidth-intensive applications

Optimize data center connectivity with integrated, high-performance metro and global connectivity
Simplified Management and Robust Network Analytics
Fabric Vision technology includes:

Monitoring and Alerting Policy Suite (MAPS): Provides a new, easy-to-use solution for policy-based
threshold monitoring and alerting. MAPS proactively monitors the health and performance of the SAN
infrastructure to ensure application uptime and availability. By leveraging pre-built, rule-based and
policy-based templates, MAPS simplifies fabric-wide threshold configuration, monitoring, and alerting.
Administrators can configure the entire fabric (or multiple fabrics) at one time using common rules and
policies, or customize policies for specific ports or switch elements.

Fabric Performance Impact (FPI) Monitoring: Uses predefined thresholds and alerts in conjunction
with MAPS to automatically detect and alert administrators to severe levels of latency and identifies
IBM System Storage SAN768B-2 and SAN384B-2 Fabric Backbones
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slow drain devices that might impact the network. This feature uses advanced monitoring capabilities
and intuitive MAPS dashboard reporting to indicate various latency severity levels, pinpointing exactly
which devices are causing or impacted by a bottlenecked port.

Dashboards: Provides integrated dashboards that display an overall SAN health view, along with
details about out-of-range conditions, to help administrators easily identify trends and quickly pinpoint
issues occurring on a switch or in a fabric.

Configuration and Operational Monitoring Policy Automation Services Suite (COMPASS): Simplifies
deployment, safeguards consistency, and increases operational efficiencies of larger environments
with automated switch and fabric configuration services. Administrators can configure a template or
adopt an existing configuration as a template and seamlessly deploy the configuration across the
fabric. In addition, they can ensure that settings do not drift over time with COMPASS configuration
and policy violation monitoring within IBM Network Advisor dashboards.

ClearLink Diagnostics : Ensures optical and signal integrity for Gen 5 Fibre Channel optics and
cables, simplifying deployment and support of high-performance fabrics. ClearLink Diagnostic Port
(D_Port) is an advanced capability of Gen 5 Fibre Channel platforms.

Flow Vision: Enables administrators to identify, monitor, and analyze specific application flows in
order to simplify troubleshooting, maximize performance, avoid congestion, and optimize resources.
Flow Vision includes these items:

Flow Monitor: Provides comprehensive visibility into flows within the fabric, including the ability to
automatically learn flows and nondisruptively monitor flow performance. Administrators can
monitor all flows from a specific host to multiple targets or logical unit numbers (LUNs), from
multiple hosts to a specific target or LUN, or across a specific ISL. Additionally, they can do
LUN-level monitoring of specific frame types to identify resource contention or congestion that is
impacting application performance.

Flow Generator: Provides a built-in test traffic generator for pretesting and validating the data
center infrastructure (including route verification and integrity of optics, cables, ports, back-end
connections and ISLs) for robustness before deploying applications.

Forward Error Correction (FEC): Enables recovery from bit errors in ISLs, enhancing transmission
reliability and performance.

Credit Loss Recovery : Helps overcome performance degradation and congestion due to buffer credit
loss.
The Fabric Vision license is included with FOS V7.2 or later. After the switch is upgraded to FOS V7.2.0
or later and the Fabric Vision license is enabled, the Fabric Watch configuration and any Fabric
Watch-related features are no longer supported.
Fabric Vision technology, an extension of Gen 5 Fibre Channel, provides a breakthrough hardware and
software solution that helps simplify monitoring, maximize network availability, and dramatically reduce
costs. Featuring innovative monitoring, management, and diagnostic capabilities, the SAN768B-2 and
SAN384B-2 fabric backbones with Fabric Vision technology enables administrators to avoid problems
before they impact operations, helping organizations meet Service Level Agreements (SLAs).
Specifications
This section lists the specifications for SAN768B-2 and SAN384B-2.
Product characteristics
Table 1 lists the product characteristics for SAN768B-2 and SAN384B-2.
IBM System Storage SAN768B-2 and SAN384B-2 Fabric Backbones
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Table 1. Product characteristics for SAN768B-2 and SAN384B-2 (part 1 of 4)
Item
Description
Product number
SAN768B-2 (2499-816)
SAN384B-2 (2499-416)
Base machine

Single chassis: Up to 512 (SAN768B-2) or 256
(SAN384B-2) 16 Gbps universal (E, F, D, M, and EX)
Fibre Channel ports using 64-port 16 Gbps Fibre
Channel blades.

Multi-chassis with UltraScale ICL ports: Up to 6144 16
Gbps Fibre Channel ports; UltraScale ICL ports (32 or
16 per chassis, optical QSFP) connect up to nine
chassis in a full mesh topology or up to 12 chassis in a
core-edge topology. Each SAN768B-2/SAN384B-2
chassis that connects to four or more
SAN768B-2/SAN384B-2 chassis via UltraScale ICLs
requires an Enterprise ICL license.
The base chassis includes these components:

One director chassis with a door, two vertical cable
management combs, redundant (active/standby) control
processor blades, redundant active/active
core-switching blades, redundant power supplies, fans,
and a ship group that includes an installation guide,
CD-ROM (with manuals), two rack-power distribution
unit (PDU) power cords, service tools and wrap tools, an
RJ-45 serial cable, wrist strap, cable retainer kit, and
SFP extraction tool.

In addition to the above components, the base chassis
of SAN768B-2 includes three blower fans and the option
for two additional power supplies. The ship group also
includes a 14U rack-mounting kit (BR120). As for
SAN384B-2, the base chassis includes two blower fans
and a 1U exhaust duct kit.
The base FOS (v7.0 or later) software includes these items:

Web Tools, Advanced Zoning, Full Fabric, Virtual
Fabrics, EGM, and an enterprise software bundle
(Fabric Watch, Extended Fabrics, ISL Trunking,
Advanced Performance Monitoring, Server Application
Optimization, Adaptive Networking, and Fabric Vision).
Note: No port or advanced functionality blades are included
in the base. Customers must order the 64-port, 48-port, or
32-port blades, or the supported specialty blades, and
populate them with transceivers.
IBM System Storage SAN768B-2 and SAN384B-2 Fabric Backbones
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Table 1. Product characteristics for SAN768B-2 and SAN384B-2 (part 2 of 4)
Fibre Channel interfaces
16/10/8/4/2 Gbps ClearLink diagnostic technology D_Port
(ClearLink diagnostic port), E_Port, EX_Port, F_Port, and
M_Port (mirror port); optional port type control
FICON interfaces
16/8/4/2 Gbps
FCIP interfaces
1 GbE and 10 GbE
Hot-swap components
Redundant (active/standby) control processor modules
(CPs), core routing modules, power supplies, fan modules,
all Fibre Channel port blades, Extension blades, SFPs, and
QSFPs
Transceivers

16 Gbps: 64-port blades require hot-pluggable 100 m or
2 km QSFP connectors; 4×16 Gbps SWL, MPO 1×12
ribbon cable connector. (66 m OM3, 100 m OM4).
QSFPs support only 4/8/16 Gbps (not 2 Gbps or 10
Gbps).

16 Gbps: 32-port and 48-port 16 Gbps blades require
hot-pluggable SFP+ and LC connectors, 16 Gbps
short-wavelength laser (SWL), long-wavelength laser
(LWL), and extended long-wavelength laser (ELWL).

10 Gbps: 32-port and 48-port 16 Gbps blades require
hot-pluggable SFP+ and LC, 10 Gbps SWL, and LWL.
The 24-port FCoE blade requires hot-pluggable, 10 GbE
SFP+ with any combination of Short-Reach (SR) and
Long-Reach (LR) optical transceivers.

8 Gbps: 16 Gbps 64-port blades require hot-pluggable
QSFP connector 4×8 Gbps SWL, MPO 1×12 ribbon
cable connector (150 m OM3, 190 m OM4)

8 Gbps: 32-port and 48-port 16 Gbps blades, and
extension blades, require hot-pluggable SFP+ and LC, 8
Gbps SWL, LWL, and ELWL.

8 Gbps: 64-port blades require hot-pluggable mSFP and
mSFP LC connector, and 8 Gbps SWL only.

4 Gbps: 8 Gbps Enhanced Extension blades need
copper or SFPs to be used with IP ports and LC, and 4
Gbps SWL and LWL.

1 GbE: Hot-pluggable optical SFP, SWL, and LWL, and
GbE copper SFP (8 Gbps Extension blade GbE ports
only).

UltraScale ICL QSFP: CR16-8 and CR16-4 require
hot-pluggable QSFP and MTP connector, and 4×16
Gbps SWL (50 m OM3, 100 m OM4, and 2 km QSFP for
long distances).
The Fibre Channel distance is subject to fiber optic cable and
port speed.
Fiber optic cable
Fiber optic cables with LC are required and available in
various lengths in single-mode and multimode formats.
Power cords
Jumper cables are included for installation. Country-specific
power cords must be ordered for desktop/stand-alone
installations.
Warranty
One year. 24×7 same-day maintenance service options are
available.
IBM System Storage SAN768B-2 and SAN384B-2 Fabric Backbones
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Table 1. Product characteristics for SAN768B-2 and SAN384B-2 (part 3 of 4)
Optional features
Blades:
 32- and 48-port 16 Gbps Fibre Channel switch blades,
no SFPs (3034 or 3035)
 32- and 48-port 16 Gbps Fibre Channel switch blades,
populated with 16Gbps SW SFPs (3634 or 3636)
 32- and 48-port 16 Gbps Fibre Channel switch blades,
populated with 16Gbps LW SFPs (3635 or 3637)
 64-port 8 Gbps Fibre Channel switch blade, populated
with 64 mSFPs (3864)
 64-port 16 Gbps Fibre Channel switch blade, populated
with 16 QSFPs (3664)
 FCoE 10GbE 24-port blade, populated with 24 x 10GbE
SFPs (3880)
 Enhanced Extension 22-port blade, no SFPs (3891)
Licenses: Inter-chassis kit (100 m or 2 km), FICON with CUP
activation, Advanced Extension activation, Extension blade
10 GbE activation, FICON Accelerator activation, Integrated
Routing, and ICL Enterprise Connectivity.
Other: SFPs, fiber optic cables, and upgrade power supplies
Scalability
Full fabric architecture of 239 switches
Performance
FC: 2.125 Gbps line speed, full duplex, 4.25 Gbps line
speed, full duplex, 8.5 Gbps line speed, full duplex, 10.53
Gbps line speed, full duplex, 14.025 Gbps line speed, full
duplex, auto-sensing of 2, 4, 8, and 16 Gbps port speeds,
and 10 Gbps and optionally programmable to fixed port
speed
ISL trunking
Frame-based trunking with up to eight 16 Gbps ports per ISL
trunk. Up to 128 Gbps per ISL trunk.
Exchange-based load balancing across ISLs with DPS
included in Fabric OS.
Chassis bandwidth


Slot bandwidth
Local switching bandwidth
512 Gbps (data rate)



UltraScale ICL bandwidth
SAN768B-2: 10.2 Tbps per chassis (512 ports × 16
Gbps data rate + 2.048 Tbps UltraScale ICL bandwidth)
SAN384B-2: 5.1 Tbps per chassis (256 ports × 16 Gbps
data rate + 1.024 Tbps UltraScale ICL bandwidth)



512 Gbps for the 16 Gbps 32-port blade: 32 ports × 16
Gbps (data rate)
768 Gbps for the 16 Gbps 48-port blade: 48 ports × 16
Gbps (data rate)
1024 Gbps for the 16 Gbps 64-port blade: 64 ports × 16
Gbps (data rate)
SAN768B-2 (2499-816): 2.048 Tbps. 32 UltraScale ICL
ports provide the equivalent of 128 x16 Gbps ports.
Each UltraScale ICL port provides 64 Gbps bandwidth
over a QSFP (4×16 Gbps) link.
SAN384B-2 (2499-416): 1.024 Tbps. 16 UltraScale ICLs
provide the equivalent of 64 16 Gbps ports. Each
UltraScale ICL port provides 64 Gbps bandwidth over a
QSFP (4×16 Gbps) link.
Both models: Frame-based trunking is enabled between
four UltraScale ICLs. DPS distributes exchanges across
all frame trunks.
IBM System Storage SAN768B-2 and SAN384B-2 Fabric Backbones
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Table 1. Product characteristics for SAN768B-2 and SAN384B-2 (part 4 of 4)
Switch latency
Locally switched port latency is 700 ns. Blade-to-blade
latency is 2.1 µsec. Encryption/compression is 5.5 µsec per
node. Forward Error Correction (FEC) adds 400 ns between
E_Ports (enabled by default).
Maximum frame size
2112-byte payload
Frame buffers
8192 per 16-port group on 32-port and 64-port blades and up
to 8192 per 24-port group on 48-port blades, dynamically
allocated
Data traffic types
Fabric switches supporting unicast
USB
1 USB port per control processor for firmware download,
support save, and configuration upload/download
Fabric services
Fabric Vision technology; Monitoring and Alerting Policy
Suite (MAPS); Flow Vision; Advanced Performance
Monitoring (APM) (including Top Talkers for E_Ports,
F_Ports, and Fabric mode), Adaptive Networking (Ingress
Rate Limiting, Traffic Isolation, and QoS), Bottleneck
Detection, Advanced Zoning (default zoning, port/WWN
zoning, and broadcast zoning), Dynamic Fabric Provisioning
(DFP), Dynamic Path Selection (DPS), Extended Fabrics,
Enhanced BB credit recovery, Fabric Watch, FDMI, Flow
Vision, Frame Redirection, Frame-based Trunking, FSPF,
Integrated Routing, IPoFC, ISL Trunking, Management
Server, Monitoring and Alerting Policy Suite (MAPS),
Configuration and Operational Monitoring Policy Automation
Services Suite (COMPASS); NPIV, NTP v3, Port Fencing;
Registered State Change Notification (RSCN), Reliable
Commit Service (RCS), Server Application Optimization
(SAO), Simple Name Server (SNS), and Virtual Fabrics
(Logical Switch, Logical Fabric)
Extension
Supports DWDM, CWDM, and FC-SONET devices, Fibre
Channel, in-flight compression (LZO), and encryption
(AES-GCM-256) BB credit recovery, FCIP, Adaptive Rate
Limiting (ARL), data compression, Fast Write, read/write
Tape Pipelining, and QoS.
FICON
FICON cascading (Fabric OS: SAN768B-2, SAN384B-2).
Support for lossless DLS, FICON CUP, and Advanced
Accelerator for FICON (FICON Global Mirror and XRC
emulation and read/write Tape Pipelining). The 8 Gbps and
16 Gbps 64-port blades must be in a logical switch that is not
being used for FICON connections; they do not support
FICON.
Special-purpose blades
The Enhanced Extension Blade (3891) provides SAN
extension over IP networks (Twelve 8 Gbps Fibre Channel
ports, and ten 1 GbE ports with license option for up to two
10 GbE ports per blade; Configuration and Operational
Monitoring Policy Automation Services Suites (COMPASS);
up to four blades).
The FCoE blade (3880) provides Fibre Channel over
Ethernet (FCoE) and Data Center Bridging (DCB) for
end-of-row server connectivity, delivering line-rate 10 Gbps
performance across 24 ports. (Up to one blade per
SAN768B-2.)
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High availability
Table 2 lists the high availability features for SAN768B-2 and SAN384B-2.
Table 2. High availability features
Item
Description
Architecture
Passive backplane, redundant active/passive control
processor, redundant active/active core switching blades,
and redundant WWN cards
Chassis power
Two 2000 W AC power supply modules (100 - 240 V
auto-sensing) and 2N redundancy. SAN768B-2 supports two
additional power modules.
Cooling
SAN768B-2: Three blower assembly modules (two are
required for operation.)
SAN384B-2: Two blower assembly modules (one is required
for operation.)
Solution availability
Designed to provide 99.999% uptime capabilities.
Hot-pluggable redundant power supplies, fans, WWN cards,
processors, core switching, port blades, and optics, online
diagnostic tests, and nondisruptive firmware download and
activation.
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Management
Table 3 lists the management features for SAN768B-2 and SAN384B-2.
Table 3. Management features
Item
Description
Management software
HTTP, simple network management protocol (SNMP) v1/v3
(Fabric Element (FE) Management Information Base (MIB),
Fibre Channel MIB), and Secure Shell (SSH), auditing and
syslog, Advanced Web Tools, advanced performance
monitoring, and IBM Network Advisor - Enterprise or IBM
Network Advisor – Professional Plus, command-line interface
(CLI), SMI-S compliant, Administrative Domains, and trial
licenses for add-on capabilities
Security
AES-GCM-256 encryption on ISLs, DH-CHAP (between
switches and end devices) and FCAP switch authentication,
and FIPS 140-2 L2-compliant, HTTPS, IPSec, IP filtering,
LDAP with IPv6, OpenLDAP, Port Binding, RADIUS,
User-defined role-based access control (RBAC), Secure
Copy Protocol (SCP), Secure RPC, SFTP, SSH v2, SSL,
Switch Binding, TACACS+, and Trusted Switch
Management access
10/100/1000 Ethernet (RJ-45) per control processor and
in-band over Fibre Channel, serial port (RJ-45) and one USB
per control processor module, and call-home integration that
is enabled through IBM Network Advisor
Diagnostic tests
Built-in flow generator, ClearLink optics, and cable diagnostic
tests, including electrical/optical loopback and link
traffic/latency/distance, POST and embedded online/offline
diagnostic tests, including environmental monitoring, FCping
and Pathinfo (FC traceroute), flow mirroring, frame viewer,
nondisruptive daemon restart, port mirroring, optics health
monitoring, power monitoring (16 Gbps blades-only),
RAStrace logging, and Rolling Reboot Detection (RRD)
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Supported environments
Table 4 lists the supported environments for SAN768B-2 and SAN384B-2.
Table 4. Supported environments*
Item
Description
Servers supported





IBM Power Systems™
IBM System p®
IBM z Systems
Selected Sun and HP servers
Other Intel processor-based servers with Linux, and
Microsoft Windows 2008 and Windows 2012
Operating systems supported





Microsoft Windows 2008 and Windows 2012
Red Hat Linux and Red Hat Linux Advanced Server
SUSE Linux and SUSE Linux Enterprise Server (SLES)
IBM AIX® storage system
Other selected operating systems
Storage products supported






IBM XIV® Storage System
IBM System Storage DS8000® storage servers
IBM Storwize® V3700, V5000, and V7000
IBM System Storage SAN Volume Controller
IBM Security Key Lifecycle Manager 2.0 or later
Other selected storage systems
FC switches supported
System Storage and TotalStorage SAN b-type and m-type
directors, switches and routers, and other directors,
switches, and routers that are manufactured by Brocade
* For the most current information, see the product details in the IBM System Storage Interoperation
Center (SSIC) at http://www.ibm.com/systems/support/storage/ssic/interoperability.wss.
IBM System Storage SAN768B-2 and SAN384B-2 Fabric Backbones
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Mechanical specifications
Table 5 lists the mechanical specifications for SAN768B-2 and SAN384B-2.
Table 5. Mechanical specifications
Item
Description
Enclosure
Rear panel-to-door airflow. SAN384B-2 ships with a 1U
exhaust shelf.
Mounting
Rack-mountable in a standard 19-inch EIA cabinet
Size
SAN768B-2

Width: 43.74 cm (17.22 in.)

Height: 62.23 cm (24.50 in., 14U)

Depth (without door): 61.29 cm (24.13 in.)

Depth (with door): 73.20 cm (28.82 in.)
SAN384B-2
Weight

Width: 43.74 cm (17.22 in.)

Height: 35.60 cm (14.00 in., 8U) plus 4.00 cm exhaust
shelf (1.75 in., 1U)

Depth without door: 61.29 cm (24.13 in.)

Depth with door: 73.20 cm (28.82 in.)
SAN768B-2

103.38 kilogram (kg) (227.90 pounds (lbs)) for 512-port
configuration fully populated

37.30 kg (82.20 lbs) for chassis
SAN384B-2

69.00 kg (152.00 lbs) for 256-port configuration fully
populated

25.40 kg (56.00 lbs) for chassis
IBM System Storage SAN768B-2 and SAN384B-2 Fabric Backbones
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Operating environment
Table 6 lists the operating environment for SAN768B-2 and SAN384B-2.
Table 6. Operating environment
Item
Description
Temperature


Operating: 0° to 40°C (32° to 104°F)
Non-operating: –25°C to 70°C (–13°F to 158°F)
Humidity

Operating: 5 - 85% relative humidity (RH)
non-condensing at 40°C (104°F)

Non-operating and storage (non-condensing): 10 - 90%
at 70°C (158°F)
Altitude (operating)
Up to 3000 meters (9842 feet)
Shock


Operating: 20 g, 6 ms, and half sine
Non-operating: 33 g, 11 ms, and half sine
Vibration


Operating: 0.5 g p-p and 5 - 500 Hz
Non-operating: 2.0 g p-p and 5 - 500 Hz
Heat dissipation
SAN768B-2

Maximum: 512-port configuration (fully loaded with
QSFPs in ICL ports), 7462 BTU/hr
SAN384B-2

CO2 emissions
Maximum: 256-port configuration (fully loaded with
QSFPs in ICL ports), 4182 BTU/hr
SAN768B-2

8.9 metric tonnes per year (max: with 384 ports using
eight 48-port blades
SAN384B-2

Airflow
4.9 metric tonnes per year (max. with 192 ports using
four 48-port blades)
Rear panel-to-door airflow
IBM System Storage SAN768B-2 and SAN384B-2 Fabric Backbones
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Power
Table 7 lists the power specifications for SAN768B-2 and SAN384B-2.
Table 7. Power specifications
Item
Description
Supported power range
Voltage


Range: 85 - 264 V ac Auto-volt
Nominal: 100 - 240 V ac
Power


85 - 132 V ac: 1000 W
180 - 264 V ac: 2000 W
In-rush current
20 Amps maximum, peak
Frequency
47 - 63 Hertz (Hz)
Power consumption


SAN768B-2 - 1952 W fully loaded
SAN384B-2 - 1064 W fully loaded
Notes
1. For the most current information, see the Fabric Vision technology solution brief:
http://ibm.co/1GWNDKc
Related information
For more information, see the following resources:

IBM System Networking SAN b-type family web page:
http://ibm.com/systems/networking/switches/san/b-type

IBM Offering Information web page (announcement letters and sales manuals):
http://www.ibm.com/common/ssi/index.wss?request_locale=en
On this page, enter SAN768B-2 or SAN384B-2, select the information type, and then click Search.
On the next page, narrow your search results by geography and language.
IBM System Storage SAN768B-2 and SAN384B-2 Fabric Backbones
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